Paint Coverage Calculator
Calculate how many gallons of paint you need for a room. Accounts for doors, windows, and number of coats.
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Standard door = ~21 sq ft
Standard window = ~15 sq ft
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350 for smooth walls, 250 for textured
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Frequently Asked Questions
How much does a gallon of paint cover?
One gallon typically covers 350-400 sq ft of smooth wall. Textured or rough surfaces may only get 250-300 sq ft per gallon.
How many coats of paint do I need?
Two coats is standard for most jobs. Use one coat for touch-ups or same-color refreshes. Dark-to-light color changes may need a primer plus two coats.
How much area does a door or window subtract?
A standard door is about 21 sq ft. A standard window is about 15 sq ft. This calculator uses these averages.
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